DefAdePro
39 points·
1 year ago·edited 1 year ago
It doesn’t combat burn in. It has absolutely nothing to do with burn in despite the myths floating about.
The short refresh performed during stand-by every 4 hours of use, simply pulses voltages across the OLEDs to remove any image retention that may have happened during those last four hours, so the screen is clean next time you switch it on.
The hour long refresh that can be done manually (or runs automatically every 2000 hours), recalibrate’s the brightness of your panel back to its optimum by measuring voltages and effectively “burning down” ones that are unusually high, to get an even field across the panel - it can then up the voltage back to full brightness without danger of blowing up the ones that were high. It does this in vertical batches, which is what causes the banding, and why the bands ‘move’ overtime. It is the most dangerous thing (to picture quality) the panel does, as it can be influenced by many outside factors such as room temperature or power cuts, but is a necessary evil as otherwise, over months the panel would just get dimmer and dimmer. It also shortens the lifespan of the panel. This is why you should not be using this function repeatedly, and why Sony officially recommends it only be used once per year.
